Run: 2026-07-09-01KX408EZTMVQDYMNRDQ9GPJPJ

Run Details

Model:
GPT-5.6 Luna
Test:
N-Length Sentences
Scenario:
Write sentences with 10 words each
Duration:
1.8s
Cost:
$0.000683
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
100.00% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain tapped softly against windows overlooking the village square below. Inspector Vale discovered blood beneath the mayor's locked study desk. Outside, church bells announced midnight while frightened witnesses gathered silently. The mayor's pocket watch had stopped precisely at eleven thirteen. No window stood open, yet muddy footprints crossed the carpet. Vale noticed one print belonged unmistakably to someone wearing slippers. Then, from upstairs, a woman's laughter echoed through the darkness. Everyone downstairs insisted the mayor's widow had died yesterday morning.
created_at"2026-07-09T17:54:24.897Z" 7/9/2026, 5:54:24 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency430
moderation_latency(null)
generation_time1694
tokens_prompt46
tokens_completion154
native_tokens_prompt41
native_tokens_completion107
native_tokens_completion_images0
native_tokens_reasoning0
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
service_tier"default"
usage0.000683
router(null)
provider_responses
0
endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_0880c1b5971c344d016a4fe050f9148195935fe5d971b43dbe"
is_byokfalse
latency277
model_permaslug"openai/gpt-5.6-luna-20260709"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1783619664-rCkIEMPOm27Ag6QB4xWG"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783619664-nEBZEuzdGqQyD4siD5mY"
upstream_id"resp_0880c1b5971c344d016a4fe050f9148195935fe5d971b43dbe"
total_cost0.000683
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
010
110
210
310
410
510
610
710